Which spot delivers the greatest amount of energy to the floor of beam spreading?

The spot that delivers the greatest amount of energy to the floor during beam spreading is typically the central spot or the focal point of the beam. This area receives the highest concentration of energy due to the focused nature of the beam's intensity. As the beam spreads out, energy density decreases, leading to lower energy delivery in the peripheral areas. Thus, the central region remains the most effective in delivering energy to the surface.